14
ACS550-CC Packaged Drive with Bypass
Installation
Terminal Block 1TB
Connection Points
Basic control connections are made to 1TB, which is a din-rail terminal block on the
back panel at the bottom of the enclosure. 1TB includes screw clamp terminals rated
for #22-10 AWG stranded or solid wire. Recommended tightening torque is 4.4 - 7.1
in-lbs.
Terminals 1TB:7 and 1TB:8 are 120 VAC control circuit terminals connected to 120
VAC control power supplied by the control circuit transformer provided. Terminals
1TB:9 and 1TB:10 are powered at 24VDC to accept an external contact closure to
start the drive. Terminals 1TB:13 and 1TB:14 are connected to un-powered relay
contacts provided for use with externally powered customer control circuits.
Additional Connections
The low voltage speed reference signal input, analog outputs, additional relay
outputs, and additional digital input connections are available on Terminal Block X1
inside the ACS550. Note that the Bypass control circuitry uses inputs and outputs
DI1,DI4 and R02. These inputs are not available for any other purpose and must not
be reconfigured. Output RO2 is wired to the terminal block, 1TB. AI1, AI2, DI3, DI5,
DI6, RO1, and R03 are available for use. Refer to the
ACS550-01/U1 User’s Manual
for information about control connections on Terminal Block X1. When making
connections to Terminal Block X1, be careful not to disturb the factory installed
wiring between X1 and the Bypass control circuitry.
Analog Input
The external “Auto” speed reference is to be connected to ACS550 analog input
AI1. The analog input can accept a voltage signal (0 – 10 VDC) or a current signal (0
– 20 mA). Jumper J1, located on the Control Board in the ACS550, determines the
signal type. J1 can be set in either the voltage or current position according to the
type of external signal that will be connected.
Refer to the ACS550-01/U1 User’s
Manual.
Run Enable Interlocks
Run Enable interlocks are normally closed un-powered contacts connected in series
between 1TB:7 and 1TB:8. When any of these contacts opens, the motor will stop,
whether in DRIVE or BYPASS. The unit is shipped with a jumper installed from
1TB:7 to 1TB:8. This jumper must be removed before connecting external contacts.
